<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <!-- 放置标题图片 @是设置的别名-->
      <div class="title-container">
        <h3 class="title">
          <img src="@/assets/common/login-logo.png" alt="">
        </h3>
      </div>

      <el-form-item prop="mobile">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="mobile"
          v-model="loginForm.mobile"
          placeholder="请输入手机号"
          name="mobile"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <!-- 直接给组件的根元素注册点击事件 -->
      <el-button
        class="loginBtn"
        :loading="loading"
        type="primary"
        style="width:100%;margin-bottom:30px;"
        @click="handleLogin"
      >登 录</el-button>

      <div class="tips">
        <span style="margin-right:20px;">mobile: 13800000002 </span>
        <span> password: 123456 </span>
      </div>

    </el-form>
  </div>
</template>

<script>
// import { validMobileFn } from '@/utils/validate'

// 每个页面中, 要用 request 都需要导入一下
// import request from '@/utils/request'
// request.get

// this.$request.get
// ----------------------------------------------------
// 联想: 提示框
// import { Message } from 'element-ui'
// Message.success()

// this.$message.success  element-ui提示框
// 原理: 将Message方法, 挂到vue实例的原型上, 任何挂到原型上的方法, 所有实例就都可以访问到了
// import { reqLogin } from '@/api/user'

export default {
  name: 'Login',
  data() {
    const validateMobile = (rule, value, callback) => {
      // rule 规则对象, 一般用不到
      // value 需要校验的值
      // callback 回调函数, 无论校验成功还是失败, 都必须调用 callback
      // (1) callback() 校验成功
      // (2) callback(new Error(错误信息))  校验失败, 并将错误信息返回
      if (!/^1[3-9]\d{9}$/.test(value)) {
        // 没通过校验, 给错误提示
        callback(new Error('请输入正确的11位手机号'))
      } else {
        // 通过了校验, 正常callback
        callback()
      }
    }
    return {
      loginForm: {
        mobile: '13800000002',
        password: '123456'
      },
      loginRules: {
        mobile: [
          { required: true, message: '请输入手机号', trigger: ['blur', 'change'] },
          { validator: validateMobile, trigger: ['blur', 'change'] }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: ['blur', 'change'] },
          { min: 6, max: 16, message: '密码必须是6-16位的字符', trigger: ['blur', 'change'] }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    async handleLogin() {
      await this.$refs.loginForm.validate()

      // 直接请求后台服务器: http://ihrm-java.itheima.net/api/sys/login'
      // 页面中调用封装好的action即可
      this.loading = true // 开启loading状态, 并且启用禁用效果 (关阀门)

      try {
        // 异步操作, 需要等异步操作结束完了, 再根据结果给提示才对
        await this.$store.dispatch('user/login', this.loginForm)

        // 直接给提示
        this.$message.success('恭喜! 登录成功!')

        // 跳转到首页, 这边请求成功, 按钮loading不需要恢复, 因为要跳走的
        this.$router.push('/')
      } catch (e) {
        // 请求失败的请求, 需要恢复的,  开阀门, 让按钮从禁用状态恢复过来
        this.loading = false
      }
    }
  }
}

</script>

<style lang="scss">
// 结论: 在 style 标签内, 如果要使用 @ 别名, 指代 src 目录, 需要加上 ~ 前缀
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#407ffe;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  background-image: url('~@/assets/common/login.jpg'); // 设置背景图片
  background-position: center; // 将图片位置设置为充满整个屏幕

  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.9); // 输入登录表单的背景色
    border-radius: 5px;
    color: #454545;
  }
}

.el-form-item__error {
  color: #fff;
  font-size: 14px;
}

.loginBtn {
  background: #407ffe;
  height: 64px;
  line-height: 32px;
  font-size: 24px;
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
